THE WHEEL ANIMALCULES (ROTATORIA) 593 



33 (40) Lorica of three or four plates. Furrows are one mid-dorsal, two 

 lateral; sometimes one mid- ventral. 



Family SALPINIDAE . . 34 



34 (35) Lorica with teeth or spines in front, or behind, or both. 



Salpina Ehrenberg. 

 Representative species (Fig. 886). . . Salpina spinigera Ehrenberg. 



35 (34) Lorica without teeth or spines 36 



36 (39) One eye present 37 



37 (38) Lorica not strongly marked, the furrows and plates noticeable only 



on close examination Diaschiza Gosse. 



Representative species (Fig. 887) Diaschiza hoodii Gosse. 



38 (37) Lorica distinct and strong Diplois Gosse. 



Two species. 



Representative species (Fig. 888) Diplois daviesiae Gosse. 



39 (36) No eye; lorica distinct Diplax Gosse. 



Representative species (Fig. 889) Diplax widens Levander. 



40 (33) Lorica of two plates. Furrows lateral. Family EUCHLANTDAE. . 41 

 One plate dorsal, the other ventral. 



41 (46) Two toes 42 



42 (45) The two plates connected by a membrane which folds into the lateral 

 furrow 43 



Small species, not specially clear, lorica often marked in various ways. 



43 (44) Lorica narrower Distyla Eckstein. 



Many species. 



Representative species (Fig. 890) Distyla inermis Bryce. 



Representative species (Fig. 891) D. ohioensis HerricL 



